This free service is amazing. If a campground is full, you can fill out a simple form and receive an email notification when a campsite opens up! I tried it out and it works great.
How it Works
Start typing the name of the campground you want to stay at. Next select a date range and the number of nights you would like to stay.
For example you could request a stay at Natural Tunnel State Park in Virginia for 3 consecutive nights anytime between January 1 and March 1.
What a great tool. Tell everyone!